Attachment for tire-setters.



PATENTED OCT. 31, 1905.

S. E. TUMALTY.

ATTACHMENT FOR TIRE SETTERS.

llllllllllll'll' 3 SHEETSSHEET 1.

APPLICATION FILED JUNE 23,1904.

PATBNTED OCT. 31, 1905.

S. E. TUMALTY.

ATTACHMENT FOR TIRE SETTERS.

APPLICATION FILED JUNE 23,1904.

3 SHEETS-SHEET 2.

PATENTED OCT. 31, 1905.

S. E. TUMALTY.

Inventor:

UNITED STATES PATENT OFFICE.

SEWARD E. TUMALTY, OF PERRY, NEW YORK, ASSIGNOR TO WEST TIRE ATTACHMENTFOR TIRE-SETTERS.

Specification of Letters Patent.

Patented Oct. 31, 1905.

Application filed June 23, 1904. Serial IfTo. 213,876.

To all whom it may concern:

December 29, 1903, and by similar machines for the purpose, shown andset forth in earlier Letters Patent-trouble has been frequentlyexperienced on account of the tendency of the inward pressure againstthe tire to cause a too sharp or marked dish of the wheel. If the wheelbe old and with already aconsiderable dish from use and from havingtires frequently set thereon, it will yield more readily to the radialinward pressure against the tire in the act of setting, and so assume asharper and more objectionable dish form. On account of this it isfrequently found difficult or quite impossible to set the tire onto thewheel firm and in a satisfactory manner. Observing these difficulties inthe practical use of these tire-setting machines and the deficiency intheir structure relating to this matter, 1 have endeavored to remedy thesame and supply the deficiency by producing the invention herein setforth, the same being means for holding the hub of the wheel downward ormore nearly in the plane of the felly during the process of compressingthe tire to place on the wheel by the means stated.

In other words, my present invention is to provide convenient means forholding the hub of the wheel in place relative with the plane of thefelly and prevent it springing out at one side while the pressure isbeing applied against the tire. To this end and for this purpose I haveprovided the means and mechanism shown in the accompanying drawings 'andset forth in the following specification,

Figure 1 is a plan of a tire-setting machine,

showing one form of my improved device in place thereon as in use. Fig.2 IS a side ele- -being on the dotted line 10 10 in Fig. 9.

vation of the parts seen as indicated by arrows in Fig. 1, parts beingbroken away and the wheel-floor diametrically sectioned. Fig. 3 is aside elevation of the foot-plate and adjacent part of the center rod,parts being broken away and axially sectioned. Fig. 4t is a centrallongitudinal section of the sleeve and cup, showing a part of the centerrod. Fig. 5 is a side elevation of parts, showing the cross-arm tilted.Fig. 6 is a side elevation of parts at the middle of the cross-arm,further showing the construction, some small parts being sectioned on avertical plane coinciding with the axis of the center rod. Fig. 7 is anelevation of the standards holding the arm, seen as indicated by arrow 7in Fig. 5. Fig. 8 is a front elevation of the catch-hook, seen asindicated by arrow 8 in Fig. 2. Fig. 9 is a side elevation of the parts,showing the arm short or of half-length. Fig. 10 is a plan of parts atthe operative end of the arm. the section Fig. 11 is an end elevation ofthe arm and incumbent parts, seen as indicated by arrow 11 in Fig. 9.Fig. 12 is a plan of the parts shown in Fig. 9, the arm being shown intwo positions by full and dotted lines and parts omitted. Figs. 3, 4, 6,7, and 8 are drawn to scales larger than that of the remaining figures.

Referring to the parts shown in the drawings, A is the steel base-ringcommon to the inventions set forth in the Letters Patent above referredto, B being the fioor of the machine for holding the wagon-wheel C whilethe tire a is being set thereon. In one form of the device shown E,Figs. 1, 2, and 5, is a stiff bar or cross-arm held at one end upon abolt 5 between opposing standards 0 0, secured rigidly to the ring A,said arm extending diametrically across above the ring and over thefloor B. The arm E is adapted to swing upon the bolt 6 in a verticalplane to occupy either a horizontal position over and parallel with thering A, as shown in Fig. 2, or turned upring, as shown in Fig. 2, ittaking this position of action automatically when the arm is broughtdown to a horizontal position ready for use.

The arm E crosses the axis extended of the ring A, it being provided atthe middle with an upwardly-projecting open bracket (Z, Figs. 1 and 2,rigidly secured to its upper surface. This bracket is formed with astraight part g, parallel with the supporting-arm, said part beingvertically pierced to receive through it a vertical center rod 71,coaxial with the ring A and the hub?) of the wagon-wheel. The rod h isthreaded for a distance upward from its lower end and provided with athreaded nut 71, held against turning with the rod in an angular cavityof a block is, rigid with the arm E. At'its upper end the center rod his provided with a hand-wheel Z for the purpose of turning it throughthe nut 71, and at its lowerend the rod has a circular foot-plate mopposite the hub b of the wheel 0. As

the external pressure is put upon the wheel in the act of setting thetire the tendency of the pressure is to increase the dish of the wheel,causing the hub to rise, which upward motion of the hub is checked andcontrolled by the opposing foot-plate. By turning the center rod hupward or downward through the nut i or adjusting it vertically to varythe distance between the foot-platem and the hub 5 previous to settingthe tire the amount of the dish of the wheel may be regulated.

The foot-plate is held movably on the end of the center rod it, asclearly shown in Fig. 3, so as to have a slight universal rocking motionon the rod, to the end that it may in every case fairly meet and pressthe end of the hub. This slight universal rocking motion of the plate onthe rod is essential, for it is frequently the case that the inner endsof the hubs of wheels are untrue or slanting and not in planes at rightangles with the axes of the hubs, and in consequence the foot-plateneeds to slightly tilt in order to fairly meet and press the end of thehub.

It is found desirable and important in the matter of holding the hubs ofthe wagonwheels against lifting or pushing out at one side while thetires are being pressed to place thereon to hold the hubs with ayielding or elastic force or pressure and not with a positive orunyielding force. To this end the arm E is frequently made of firmelastic material, as hard wood, like oak, hickory, or ash, so as to bendupward with resisting force when hard pressed by the rising hub of thewagon-wheel, the nut i being held immovable on the arm by some simpleand ordinary means. I generally prefer, however, in making this form ofattachment to make the arm quite rigid, as of hollow or tubular metal,and supply the center rod h with a spring 0 to resist the upward motionof the hub of the wheel. For using the spring 0 I employ a sleeve 17.,Figs. 2, 4:, and 6, on the center rod h, threaded in the horizontal part9 of the bracket 0?, and an inverted cup p over the spring independentof both the sleeve and the rod it, the spring beingbetween the cup andthe nut 71, as shown. At its upper end the sleeve is formed with aknurled ring 7', constituting a handle for turning it, andby turning thesleeve upward or downward through the bracket the tension of the springmay be regulated and so the resistance of the foot-plate m to. theupwardly-moving hub controlled. In constructing this sleeve nI usuallyform it with a prismatic head 8, Fig. 6, for the purpose of using awrench, when necessary, for turning it.

To control the arm E in its vertical swinging movements, aweighted cordor cable a is employed, secured in an eye o, rigid with the arm andpassing over a pulley (not shown) overhead, which serves to hold the armand parts normally up out of the way when putting the wagon-wheels intothe machine and removing them therefrom after the tires are set.

Old wagon-wheels or those having been.

long used and other wheels are frequently sufliciently dished, in whichcases the footplate m is primarily brought firmly down against the hub,as shown in Fig. 9, before the external pressure is applied againstv thetire, Which prevents a further dishing of the Wheel. In case the wheelhas no dish or only a slight dish, as is frequently the case, morecommonly with new Wheels, the foot: plate is brought to a positionslightly above the hub, as appears in Fig. 2, before the pressure isapplied to the tire. This plate, previously set or adjusted withreference to the hub, acts to receive the rising hub and hold it againstfurther rise, except as the.

stiff spring 0 slightly yields upward.

In employing the half-length or radial overhanging arm F, Figs. 9 to 12,in place of the diametral arm E to hold the center rod h and associatedmechanism said short arm is made to rest upon the ring A, being heldthereto by a single pivotal bolt w, rigid in the ring. This half-lengtharm F is formed with an enlarged outwardly-extended foot a, resting, inpart, directly upon the ring A, but mainly upon an extended horizontalbracket or shelf d, secured to the ring with its upper surface IIO evenwith the corresponding surface of the ring. The armF is formed with acircular head or at its extreme overhanging end, the construction of thewhole being such that the head as is horizontal and coaxial .with thehub a cross slot or recess 2 for receiving and holding the nut z' of thecenter rod, the sleeve n being threaded'through the upper horizontalpart of the bracket, as in case of the bracket cZ already described. Thebracket y is permanently securedto the arm F; but the other partsassociated with the bracket-that is to say, the center rod h, with itsfoot-plate and hand-wheel, and the sleeve 11, the cup p, and the spring0, are the same used with the arm E, as described, all beingtransferable as to the two different arms, fitting both alike. Whenputting a wheel into the machine for setting the tire, the arm F isturned horizontally to one side out of the way, as indicated by dottedlines in Fig. 12, this motion of the arm being made on the pivot-bolt w.A stoppin 6, rigid in the shelf 03, in position to meet the foot 0' ofthe arm, serves to arrest the swinging motion of the arm and hold thehead :10 centrally over the hub. of the wheel.

What I claim as my invention, and desire to secure by Letters Patent, is

1. An attachment for a tire-setting machine, comprising a center rodcoaxial with the hub of the wheel receiving the tire, a support for saidrod, a part on the center rod to meet the hub of the wheel, auniversal-joint connection between said part and rod, a spring aroundsaid rod and means cooperating with said spring to resist the upwardmotion of the hub and means adapted to extend over the wheel and inwhich said center rod is mounted.

2. An attachment for a tire-setter consisting of an arm over the floorof the machine, a slidable center rod held coaxially with the hub, aspring around said rod and having a bearing on said arm, a plate on thecenter rod having a universal-joint connection with said rod, and meanscooperating with said spring to resist the movement of the hub.

3. An attachment for machines for setting tires consisting of abase-ring, an arm over the base-ring and crossing the extended axisthereof, a slidable center rod on the arm held coaxial with the hub andwith the base-ring to conform to the hub of the wheel, means forpermitting the movement of the arm out of action, a plate on the centerrod having a universal-joint connection with said rod, a spring aroundsaid rod and means cooperating with the spring to resist the upwardmovement of the hub.

4. An attachment for a tire-setting machine, having an arm over thebase-ring, a bracket on the arm, a center rod guided by the bracket, anut threaded on the center rod and supported by the arm, and means onthe bracket and spring means on the center rod to resist upward motionsof the hub of the wheel.

5. An attachment for machines for setting wagon -tires, consisting of amovable arm over the base-ring, a bracket on the arm, a center rod inthe bracket, a threaded nut on the center rod and held against turningthereon, a sleeve threaded in the bracket, and receiving said centerrod, said rod being movable in the sleeve and said nut being movablewith the rod, and a spring interposed between said nut and the sleeve,and means on the center rod to meet the hub of the wheel.

6. In an attachment for a tire-setting machine, a horizontal arm overthe machine, a vertical center rod held by the arm coaxial with thewheel and independent of the hub thereof, a foot-plate on the center rodto press against the end of the hub of the wheel, and means forlongitudinally adjusting the center rod and means around said rod forholding said foot-plate with yielding pressure against the hub of thewheel.

In witness whereof I have hereunto set my hand this 20th day of June,1904, in the presence of two subscribing witnesses.

SEW ARD E. TUMALTY.

